Rotary engine.



Patentedluly l8, I899.

J. L. m. ROTARY ENGINE.

(Appkcl-tmn 8106 June 18 1898) a Shank-Shan I. 1

(In Ian den.)

" UNITED STATES dbl-1N L. KEIL, or BLAIR,

PATENT. @FFICEL' KEIL, or sfAME PEACE;

ROTARY enema.

srncrrrcarrolv forming part of Letters Patent 110,629,297, dated July18, 1899.

Application filed June 18, 1893;

To all whom, it may concern:

Be it known that I, JOHN L. KEIL, acitizenv of the United States ofAmerica, residingat;

The object of this invention is to econom-I' ically utilize steam,compressed air, or gas in the propulsion of machinery. i My inventionconsists in the construction, arrangement, and combination of elementshereinafter set forth, pointed out in my claim, and illustrated by theaccompanying draw{ ings, in which- I 1 Figure 1 is an elevation of oneside of the complete engine. Fig. 2 is a verticalsection of the engine.Fig. 3 is a vertical section of the engine at right angles to thesection of Fig. 2.. r l In the construction of the engine as shown thenumeral 10 designates a casing mounted on a base 11 and provided withremovable heads12 13. Tl1eheads12 13are formedwith annular grooves 1415, respectively, on their inner faces, which grooves mate with grooves17 18, formed in the casing 10 and provided with cylinders, within whichthe piston-heads travel. A steam-pipe 19 is secured at one end to thecentral portion of a valvechamber 20, located above and fixed to thecasing 10, and a throttle-valve 21 is mounted foreseih lation in saidvalverchamb'er. Two ingress-I ports 22 23 lead from thevalve-chamber'2Qto the cylinders. Rocking valves 24 25 are seated in and control thepassage through the ports 22 23. A shaft 26 is mounted for rotation inthe casing 10 and heads 12 1-3, concentrio with the annular cylinders,and hubs 27 28 are mounted on and keyed to the said shaft within thecasing, which hubs are securedtoget-herbybolts 29 29. Packing-rings303030 30 are mounted on the hubs 27 28 and form-steam-tight jointsbetween said hubs and the casing. Piston-heads 31 32 are fixed to thehubs 27 28. in diametrically opposite positions and project from thehubs into the- Serial No. 683,882. (No model.)

for vertical reciprocation'in said seats. Packportion of theslidingabntments 35 '36, and

expansive springs 39 40, mounted in said sliding abutments, impingeagainst the plates and hold the same in contact with the hubs 27 28 whenthe sliding abutments are in their lowest positions. An exhaust-cavity41 is formed in the casing 10 between the cylinders, and exhaust-ports42 42 open from the respective cylinders into said cavity, which portsare located adjacent to and on opposite sides of the vertical plane ofthe sliding abutments 35 36. Condensation-ports 44: 45 are formed in thelower portion of the casing 10, communicating with the cylinders, andpetcocks 4:6 47 control the passage through said ports. An exhaust-port48 leads through the lower portion of the casing 10 from theexhaust-cavity4l.

-T he throttle-valve 21 is provided with a crank 49, and a hand-lever ormanually-reciprocated rod 50 is connected at one end to said crank andsupported on a bracket 51,

.ing-plates 37 38 are mounted in the lower fixed to the casinglO. ICranks 52 53 arefixed I reciprocation in oscillating levers 64 65,fulcrumedon the cylinder-head 12 by means of stub shafts or pivots 6667. The blocks 62 63 are both connected to a connecting-rod68'at oneend,and the oute r end of said rod is pivoted to the lower end of amanually-operated lever .69.. ,The lever 69 is keyed near. itscenter onone end of a rock-shaft 70, which shaft is horizontally positioned andextends from side to side of the engine. A piston 71 is mounted forreciprocation in a cylinder 72, fixed to the basell, and is connected toone end of each oscillating lever v64 65. A frame 73is mounted ontheshaft 26 for reciprocation transversely of saidshaft and isconnectedat one end to one end of the lever 65. A cam-wheel 74 is loosely mountedon the shaft 26 and is so arranged relative to the frame 73 as toreciprocate said frame. A ratchet-wheel 75, having ratchets facing bothdirections,is mounted on the shaft I the casing 10.

26,and spring-pressed detents 76 77,0ppositely arranged on the cam-Wheel74, engage the ratchets. I in the exhaustports 42 43, and gear-Wheels S081, fixedto said valves, are engaged by rods 82 83, fixed, respectively,to the lever 69, and a crank-arm 84, fixed to the shaft 70. Anoscillating lever 85 is mounted on a pivot 86, fixed to the head 12, andan antifriction-wheel 87 on one end of said lever travels in a camgroovein a cam-wheel 88, mounted on the shaft 26. The outer end of the lever85 is slotted, and a block 89 is mounted in the slot therein. Aconnecting-rod formed of two sections 90 91, telescoping relative toeach other, is connected at its lower end to the block 89 and at itsupper end to a crank 92, fixed to a rockshaft 93, mounted in a bracket94, rising from The section 90 and a set-screw 95 are mounted in thesection through a slot 96 in the section 91. A collar 97 is rigidlymounted 011 the section 91, and a spring 98, of expansive character,mounted on the rod, impinges at one end against said collar. The section90 is screw-threaded at 9'9, and a collar 100, interior-1yscrew-threaded, is mounted adj ustabl-y on the said screw-threadedportion and receives impingement of the lower end of the spring 98. Therock-shaft 93 is rigidly secured to one end of crank-arms 101 102, whichextend horizontally to and are connected with stems on the slidingabutments 35 36. A slotted lever 103 is fulcrumed at its center on apivot 104, fixed to thccylinder-' head 12, and a block 105 is mountedfor re ciprocation in said lever. A connecting-rod 106 is fixed at itsupper end to the block 105,

and the lower end of said rod has a pivotal connection to the cam-wheel88. A connecting-rod 107 is fixed at one end to the block 105 and at theother end to the lever above the rock-shaft 70. The outer end of a rod108 and the upper end of said rod is fixed to a crank 109 on a shaft110, which shaft has a bevel-gear connection with a centrifugal governormechanism, and the governor mechanism is belted (Q-$116 shaft 26. Theopposite side of the engine is provided with a d uplicate of themechanism described.

In practical use the steam enters through 'thethrottle andone of therocking valves and engages one of the piston-heads, a backing beingformed by the sliding abutment 35. The piston-head is caused to travelto the point A by the steam-pressure, and at this point the steam is cutoff by the automatic rotation of the rocking valve, and the expansion oftheconfined steam impels the pistonhead to the exhaust-port, at whichtime the expansion of the steam has entirely been utilized. \Vhenthe-first piston-head makes a one-half revolution, the rocking valveopens to the other cylinder, and entering steam acts upon the otherpiston-head in like manner.

Rocking Valves 78 79 are mounted The sliding abntments 35 36automatically rise to permit the passage of the piston-heads after theexhaust from the respective cylinders, and the governor mechanismcontrols the entrance of the steam by automatically opening and closingthe rocking valves.

By the use of the hand-lever 69 the engine may be reversed byreversingthe passage of steam from one rocking valve to the other.

By arranging the exhaust near the end of the stroke I provide forutilizing the entire expansive energy of the steam.

By the use of the double piston-heads I provide for the action of steamon one head or the other almost continuously, thus avoiding dead-centersand reciprocating movements.

It is obvious that gas, compressed air, or similar expansive mediummaybe employed 7 in place of steam.

1 claim as my invention- An engine comprising a casing having two ormore annular cylinders, two concentric pistons mounted for travel insaid cylinders, a

shaft to which said concentric pistons are rig-' idly connected, boltstransversely seated in and rigidly connecting the hubs of'the concentricpistons, steam-ingress ports leadin g to said cylinders, athrottle-valve arranged for manual actuation and controlling saidingress-ports, rocking valves mounted in and controlling said portsadjacent the cylinders, cranks attached to said rocking valves, rodsattached at their upper ends to said cranks,

blocks carried on the lower ends of said rods,

levers mounted for oscillation, in which said blocks are slidinglymounted, dash-pot mechanism connected with the levers, a frame mountedfor reciprocation and oscillation transverselyof the shaft'and attachedto the dash-pot mechanism, ahand-lever controlling the oscillation ofthe frame, an adjustable cam-wheel on the main shaft, a governor,connections between the cam-wheel and governor and controlled by thehand-lever controlling the oscillating levers, sliding abutmentsarranged .for alternate rectilinear re- JOHN L. KEIL.

\V itnesses:

S. XV. EVANS, O. G. KEIL.

